It was pretty intuitive really. When I was working at Amazon, we had an internal system for training videos. As I was always on teams with fairly complex technical products (S3 and Alexa), the videos would always be pretty long and packed with dense technical content.

So whenever I wanted to look any information up inside these videos, there was no way to do it - you could search by title, description or other such metadata, but searching the content and navigating to the exact spot where something was covered was impossible.

This was the spark that led to the product.